Two new species of Astyanax Baird & Girard (Characiformes: Characidae) from the upper rio Paraguacu basin, Chapada Diamantina, Bahia, Brazil

Autor(es)

Zanata, Angela M. ^[1] ; Burger, Rafael ^[1] ; Camelier, Priscila ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Bahia, Inst Biol, Rua Barao de Geremoabo 147, BR-40170290 Salvador, BA - Brazil

^[2] Univ Sao Paulo, Museu Zool, Caixa Postal 42494, BR-04218970 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Zootaxa; v. 4438, n. 3, p. 471-490, JUN 22 2018.
• Citações Web of Science: 7

Resumo

Astyanax lorien and A. rupestris are described from tributaries of upper rio Paraguacu basin, Bahia, Brazil. Both species shares the majority of the characters currently used to define the Astyanax scabripinnis species complex, with highest body depth approximately at vertical through pectoral-fin midlength and a low number of branched anal-fin rays (15-21). Astyanax lorien is distinguished from its congeners by a combination of characters, including presence of small bony hooks on all fins of mature males, a unique vertically elongate humeral blotch, and ventral margin of the third infraorbital close to the horizontal limb of preopercle. Astyanax rupestris is distinguished from its congeners also by a combination of characters, including ventral margin of third infraorbital distinctly separated from horizontal limb of preopercle, leaving a broad area without superficial bones, absence of midlateral stripe on body, absence of blotch on caudal peduncle, and presence of a vertically elongated conspicuous dark humeral blotch, not bordered anteriorly and posteriorly by distinct unpigmented areas. Both species are apparently endemic to the upper portion of the Paraguacu river basin, within the Chapada Diamantina domain. (AU)

• Processo FAPESP: 16/03966-1 - Filogeografia comparada de peixes de água doce da Mata Atlântica: uma análise multilocus de representantes da família Characidae (Teleostei: Characiformes)
• Beneficiário: Priscila Camelier de Assis Cardoso
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado